Selecting a mobile phone for personal use is no easy task because technology________so rapidly.[ ]

Jim and John are often told ________ too much time playing video games.

My pen is missing. I can’t find ____ anywhere.

The weather has been very hot and dry. —Yes. If it had rained even a drop, things would be much better now! And my vegetables.

________ these experiments were successfully completed would we think of going into humans.